Keystone Solutions

hybrid • BEL • senior • Не указана

**Mission Overview:** Keystone Solutions is hiring an Operational Security Engineer for a consultancy mission within a client's IT Security Production organisation in Brussels. As a Keystone Solutions consultant, you will represent Keystone Solutions while working on the client project, collaborating with business stakeholders, local IT teams and wider group IT partners. You will join a Mainframe System Security squad responsible for establishing security standards, ensuring their correct implementation and compliance, implementing rules to support infrastructure teams, supporting users during security-related incidents, and managing, correcting and documenting security risks identified by auditors. As a Mainframe Operational Security Engineer, you will be a key expert in keeping the client's Mainframe environment secure, compliant and resilient. **Key Responsibilities:** Under Keystone Solutions' consultancy model, you will: * Manage user permissions and access for systems outside IAM, ensuring security without blocking operations. * Manage the content of the RACF database, either manually or through automation. * Create clear security documentation and standards so teams understand what to do and why it matters. * Handle encryption tasks, from importing certificates to configuring technical agents for Hardware Security Modules (HSMs). * Assess the security of new Mainframe products, ensuring they are safe before going live. * Collaborate with squad members to resolve security incidents, from decoding error messages to implementing fixes with minimal disruption. * Support internal clients including IT Risk, Asset Owners and auditors by providing evidence for compliance and addressing audit findings. * Anticipate potential risks and address them before they become issues for clients. * Participate in the squad's on-call rotation to resolve critical job failures outside business hours, approximately one week per month, covering non-business hours including weekends and holidays during that week. **Language Requirements:** * English: mandatory. * Dutch: preferable. * French: preferable. **Education and Certifications:** * Bachelor's degree. * RACF Security Administrator certification: mandatory. * zSecure RACF certification: preferable. **Working Model and Travel:** * Mandatory 50% on-site work in Brussels and 50% homeworking. * Travel: not applicable. **Required Experience:** **At Least 10 Years Of Relevant Experience Is Required.** **Mandatory Technical Knowledge:** * RACF and surrounding utilities. * Mainframe Architecture. * Basic Mainframe tools including JCL, ISPF, REXX and SDSF. * Role Based Security Modelling. * AT-TLS and certificates. * Security of DB2, IMS, including database and transaction management, and MQ. * Job Scheduling. * Mainframe system subsystems and their security, including Spool, network, storage and SMF. * Public Key Infrastructure and Mainframe CryptoCards. * Unix System Service. **Preferred Technical Knowledge:** * Knowledge of the zSecure product suite. * Knowledge of the job scheduler Control. * Knowledge of COBOL. * Knowledge of Endevor. **Business Experience:** * Mandatory: cybersecurity experience, with hands-on Mainframe expertise and the drive to build it further. * Preferable: experience in the financial sector. **Soft Skills:** * Analytical skills: ability to navigate complex scenarios involving conflicting security rules across different manuals. * Critical thinking: ability to assess requests against security standards rather than taking them at face value. * Problem-solving: ability to trace vague error messages back to their root cause and implement fixes. * Creativity: ability to design custom solutions for hundreds of compliance points where no playbook exists. * Agile mindset: ability to thrive in teamwork while taking ownership of your responsibilities, or eagerness to learn. * Proactivity: ability to identify risks early in a high-volume environment and resolve them before they escalate. **Why Join Keystone Solutions:** This is a consultancy opportunity where you are hired by Keystone Solutions and bring your expertise to a client environment as a Keystone consultant. The model combines meaningful on-site client engagement with exposure to dynamic projects and diverse technical and strategic challenges across client environments. This variety creates turbo-charged learning opportunities, broadens your professional experience and supports skyrocketing ambition through continued career growth within Keystone Solutions. Being a K-Stone means bringing Keystone Solutions' core values to every engagement, combining technical expertise, accountability, collaboration and a consultancy mindset while delivering value to client projects. **Apply:** If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal.